摘要
针对煤矸石浆液管道充填中坡度—管长耦合作用机制不明导致的堵管与效率低下问题,基于正交实验方法,系统研究了5°~25°坡度和50~300 m管长条件下充填管道的坡度与管长耦合效应对充注性能的影响机制。结果表明:不同坡度条件下管长对流动特性的影响呈现显著差异:低坡度时管道压损随管长增加而显著增大,而中坡度时重力势能驱动效应占主导地位;首次确定了坡度与管长的最优协同工作区间,该区间可实现降低沉降率同时以最低能耗运行。研究创新性地量化了坡度与管长对临界流速和流动稳定性的交互影响规律,并据此提出了适用于不同工程条件的三种优化设计方案。工程应用表明,该研究成果可使系统能耗降低8%~20%,充填效率提高15%~25%,为矿山充填系统的优化设计提供了重要的理论依据和技术支撑。
Aiming at the problem of pipe blockage and low efficiency caused by the unclear coupling mechanism of slope and pipe length in the filling of coal gangue slurry pipeline,this study systematically studied the influence mechanism of slope length coupling effect of filling pipeline on the filling performance under the conditions of 5°~25°slope and 50~300 m pipe length based on the orthogonal experimental method.The results show that:the influence of pipe length on flow characteristics is significantly different under different slope conditions:the pressure loss increases significantly with the increase of pipe length at low slope,while the gravity potential energy driving effect is dominant at medium slope;For the first time,the optimal cooperative working range of slope and pipe length is determined,which can reduce the settlement rate and operate with the lowest energyconsumption.The interactive effects of slope and pipe length on critical velocity and flow stability are studied and quantified innovatively.Based on this,three optimal design schemes for different engineering conditions are proposed.The engineering application shows that the research results can reduce the system energy consumption by 8%~20% and improve the filling efficiency by15%~25%,which provides an important theoretical basis and technical support for the optimization design of mine filling system.
作者
任志玲
郝希玺
王潇
张敏
敖旋峰
王正进
李卫
REN Zhi-ling;HAO Xi-xi;WANG Xiao;ZHANG Min;AO Xuan-feng;WANG Zheng-jin;LI Wei(Coal Mine Exploration GuiZhou Province of 113 Team,Guiyang,Guizhou 550081,China;Guizhou academician workstation for fine mining and environmental protection,Guiyang,Guizhou 550000,China;Guizhou Province Qiandi Jingkai Technology Co.,Ltd.,Guiyang,Guizhou 550025,China;Guizhou Institute of Technology,Guiyang,Guizhou 550003,China;Guizhou Tianyi Hengsheng Technology Co.,Ltd.,Guiyang,Guizhou 550081,China)
出处
《煤炭加工与综合利用》
2025年第8期123-127,共5页
Coal Processing & Comprehensive Utilization
基金
贵州省能源局科技榜单项目(贵州渣坪煤业有限责任公司煤矸石井下充填开采技术攻关及试点示范应用)
贵州省科技计划项目(黔科统研[2024]379号)
贵州省科技计划项目(黔科合平台KXJZ[2024]003)。
关键词
煤矸石
矿山充填
坡度
管道长度
耦合效应
正交实验
coal gangue
mine filling
slope
pipe length
coupling effect
orthogonal experiment
